首页 | 官方网站   微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1717篇
  免费   103篇
  国内免费   5篇
医药卫生   1825篇
  2023年   8篇
  2022年   22篇
  2021年   66篇
  2020年   35篇
  2019年   44篇
  2018年   75篇
  2017年   51篇
  2016年   47篇
  2015年   64篇
  2014年   81篇
  2013年   101篇
  2012年   119篇
  2011年   131篇
  2010年   96篇
  2009年   69篇
  2008年   97篇
  2007年   99篇
  2006年   91篇
  2005年   83篇
  2004年   74篇
  2003年   71篇
  2002年   63篇
  2001年   26篇
  2000年   27篇
  1999年   31篇
  1998年   16篇
  1997年   11篇
  1996年   5篇
  1995年   4篇
  1994年   10篇
  1993年   8篇
  1992年   12篇
  1991年   14篇
  1990年   25篇
  1989年   14篇
  1988年   12篇
  1987年   8篇
  1986年   4篇
  1985年   4篇
  1984年   4篇
  1982年   1篇
  1978年   1篇
  1973年   1篇
排序方式: 共有1825条查询结果,搜索用时 15 毫秒
1.
Treatment guidelines for management of uncomplicated gonorrhoeae have been recently modified owing to alarming upsurge in azithromycin resistance. This study investigated the prevalence and genetic determinants of gonococcal azithromycin resistance in India. Four (5.7%) of 70 gonococcal isolates were resistant to azithromycin. Of 16 isolates investigated for molecular mechanisms of resistance, 13 (81.3%) and 6 (37.5%) isolates exhibited mutations in coding and promoter regions of mtrR gene, respectively. However, ermA, ermB and ermC genes or mutations in rrl gene were absent in all isolates. Azithromycin resistance is low in India posing no immediate threat to use of dual-therapy for syndromic management.  相似文献   
2.
Family-centered care (FCC) for sick newborns is emerging as a paradigmatic shift in the practice of facility-based newborn care. It seeks to transforming a provider-centered model into a client-centered one and thus build a new therapeutic alliance. FCC is the cornerstone of continuum of care, imparting caregiving competencies to parents/caregivers both within institutions as well as after the discharge. This has potential gains for the newborn, family members, and facility-level staff. The initial model piloted in tertiary-care settings is now undergoing translation at five sites across the country; the outcomes are keenly awaited.  相似文献   
3.
BACKGROUND: Abnormalities in calcium and vitamin D metabolism have been reported after bariatric surgery. The purpose of this study was to evaluate vitamin D nutritional status among morbidly obese patients before gastric bypass surgery. METHODS: We prospectively studied 279 morbidly obese patients seeking gastric bypass surgery for vitamin D nutritional status as assessed by serum 25-hydroxyvitamin D level. In addition, serum samples were analyzed for calcium, alkaline phosphatase (AP), intact parathyroid hormone (PTH), and 1,25-dihydroxyvitamin D. RESULTS: Mean patient age was 43 +/- 9 years; 87% of the study patients were women, and 72% were white. Serum calcium and AP levels were normal in 88% and 89% of the patients, respectively. Vitamin D depletion, defined as serum 25-hydroxyvitamin D level 相似文献   
4.
The present study revealed that the majority of nurses had adequate knowledge about dietary practices during the antenatal and post-natal period. However, their knowledge about nutritive value of foods and nutrition advice during disease conditions was inadequate. It is recommended that to make the training more meaningful, the identification of the incorrect dietary beliefs of trainees should be done at the beginning of the training course. Each incorrect belief should be explained in detail for better comprehension of the correct knowledge in nutrition.  相似文献   
5.
In the present study, chlorogenic acid (CGA) isolated from Anthocephalus cadamba was screened for hepatoprotective activity by in vitro and in vivo assay methods using carbon tetrachloride (CCl4) as a model of liver injury. Intraperitoneal administration of CGA to mice at a dose of 100 mg/kg body weight for 8 days caused significant reversal in lipid peroxidation, enzymatic leakage, cytochrome P450 (Cyt P450) inactivation and produced enhancement of cellular antioxidant defence in CCl4-intoxicated mice, revealing that the antioxidative action of CGA is responsible for its liver protective activity. CGA exhibited a better therapeutic protective action than silymarin (SM), in CCl4-administered mice.  相似文献   
6.
7.
Nonmotor symptoms (NMS) of Parkinson's disease (PD) are not well recognized in clinical practice, either in primary or in secondary care, and are frequently missed during routine consultations. There is no single instrument (questionnaire or scale) that enables a comprehensive assessment of the range of NMS in PD both for the identification of problems and for the measurement of outcome. Against this background, a multidisciplinary group of experts, including patient group representatives, has developed an NMS screening questionnaire comprising 30 items. This instrument does not provide an overall score of disability and is not a graded or rating instrument. Instead, it is a screening tool designed to draw attention to the presence of NMS and initiate further investigation. In this article, we present the results from an international pilot study assessing feasibility, validity, and acceptability of a nonmotor questionnaire (NMSQuest). Data from 123 PD patients and 96 controls were analyzed. NMS were highly significantly more prevalent in PD compared to controls (PD NMS, median = 9.0, mean = 9.5 vs. control NMS, median = 5.5, mean = 4.0; Mann-Whitney, Kruskal-Wallis, and t test, P < 0.0001), with PD patients reporting at least 10 different NMS on average per patient. In PD, NMS were highly significantly more prevalent across all disease stages and the number of symptoms correlated significantly with advancing disease and duration of disease. Furthermore, frequently, problems such as diplopia, dribbling, apathy, blues, taste and smell problems were never previously disclosed to the health professionals.  相似文献   
8.
A Survey of Childhood Psoriasis in Kuwait   总被引:1,自引:0,他引:1  
Abstract: One hundred ninety cases of childhood (age birth-12 yrs) psoriasis constituted 0.3% of the total of new dermatologic outpatients. Girls outnumbered boys by a ratio of 1.5:1. Plaque psoriasis was the commonest clinical variant (84%), followed by guttate psoriasis. The scalp was the most common site of onset (22%). Sites predominantly affected later were the extensor surfaces of the legs and the scalp (63% and 53%, respectively). A majority of the children had a milder form of disease. Nail involvement was seen in 36%, with pitting the most common feature (87%). Seven percent had mucosal involvement. A positive family history of psoriasis was obtained in 28%. Topical therapy (coal tar, anthralin, steroids) was the main treatment in the majority of patients (92%). Sixteen patients (8%) required more aggressive intervention (ultraviolet B, psoralin-UVA, retinoids). This is the first study of this kind from the Middle East, the findings are compared with those reported from other parts of the world.  相似文献   
9.
A declining trend of breast feeding (BF) was noticed in the early 1970s, but a decade of intensive campaigning by national and international agencies for BF has reversed this. The objective of the present study was to assess the knowledge and attitude amongst teachers before launching an orientation course in maternal and child health care for them. A structured questionnaire was administered to 62 married women teachers of middle socioeconomic background and education. 98% of mothers knew that breast milk was the nutrition of choice up to 4-5 months of age, and 94% mentioned that BF should be started immediately after birth. 94% of subjects knew that colostrum should be given, 95% were aware that protective substances were present in breast milk. 61% were cognizant of the need to continue BF as long as possible. 92% of the subject knew about improved mother-infant bonding owing to BF. Only 60% knew that lactation provided complete protection against pregnancy during the first 4 months. 615 of the mothers deemed BF in public embarrassing. All subjects were aware that unhygienic bottle feeding caused diarrhea, whereas BF offered protection. Many of them felt that BF should be stopped when the mother had tuberculosis (16%), malaria (55%), and diarrhea (60%). 65% of mothers had misconceptions that diluted top milk should be given even after 4 months of age, while 35% were mistaken that commercial preparations of milk were more nutritious than breast milk. 76% had the erroneous knowledge that high consumption of almonds, cashew nuts and other dried fruits increased the volume of breast milk. 94% of the teachers knew that the child should get colostrum, and almost 37% felt that bottle feeding should be entirely avoided. These results point to the urgent need of starting nutrition education programs for working mothers.  相似文献   
10.
Abstract: We performed a retrospective analysis of clinical course of 91 patients who developed both breast cancer and a chronic lymphoproliferative neoplasm and were seen at the M. D. Anderson Cancer Center between January 1, 1970 and December 30, 1991. The sample included 24 individuals who developed lymphoproliferative neoplasm first (Group A), 22 individuals with concurrent diagnosis of both malignancies (Group B), and 45 individuals who developed breast cancer first (Group C). The median time to diagnosis of secondary breast cancer and lymphoproliferative neoplasm was 66 months (range, 7–459) and 65 months (range, 0–334), respectively. A higher proportion of Group B lymphomas were low-grade (77% vs. 47% [Group A] vs. 37% [Group C] p = 0.009). Prior occurrence of either one of these malignancies did not affect the disease-specific survival from the second malignancy. However, continuing mortality from the first malignancy appeared to contribute to a poor overall survival following second malignancy. Group A included 8 patients who developed breast cancer following radiation therapy for Hodgkin's disease after a mean interval of 18 (± 4.3) years. Three of these individuals had coexisting ductal and lobular histology (vs. none of the individuals in Groups B and C, p = 0.02). Another interesting finding was the high incidence of multiple additional malignancies in this patient population. A total of 29 additional neoplasms occurred in 21 (23%) of the 91 study subjects. These malignancies involved a wide variety of organ sites and could not be attributed to the therapy for either the breast cancer or the lymphoma in most cases. The data suggest that individuals who develop both breast cancer and a lymphoproliferative neoplasm are at a high risk for multiple malignancies. Close surveillance of such individuals for additional malignancies and further studies to understand the molecular basis of this predisposition are warranted.?  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号