首页 | 本学科首页   官方微博 | 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   4157篇
  免费   242篇
  国内免费   34篇
耳鼻咽喉   73篇
儿科学   123篇
妇产科学   124篇
基础医学   525篇
口腔科学   161篇
临床医学   331篇
内科学   743篇
皮肤病学   82篇
神经病学   246篇
特种医学   138篇
外国民族医学   3篇
外科学   630篇
综合类   166篇
一般理论   9篇
预防医学   236篇
眼科学   183篇
药学   419篇
中国医学   19篇
肿瘤学   222篇
  2023年   73篇
  2022年   159篇
  2021年   246篇
  2020年   129篇
  2019年   145篇
  2018年   225篇
  2017年   118篇
  2016年   129篇
  2015年   141篇
  2014年   163篇
  2013年   207篇
  2012年   289篇
  2011年   285篇
  2010年   153篇
  2009年   149篇
  2008年   209篇
  2007年   184篇
  2006年   182篇
  2005年   151篇
  2004年   161篇
  2003年   143篇
  2002年   137篇
  2001年   57篇
  2000年   57篇
  1999年   55篇
  1998年   26篇
  1997年   24篇
  1996年   19篇
  1995年   27篇
  1994年   13篇
  1993年   8篇
  1992年   43篇
  1991年   34篇
  1990年   28篇
  1989年   30篇
  1988年   26篇
  1987年   15篇
  1986年   12篇
  1985年   15篇
  1984年   12篇
  1983年   8篇
  1982年   14篇
  1981年   8篇
  1980年   10篇
  1979年   10篇
  1978年   10篇
  1977年   12篇
  1975年   10篇
  1974年   13篇
  1969年   7篇
排序方式: 共有4433条查询结果,搜索用时 15 毫秒
41.
42.
43.
Objective The purpose of this study was to determine consumer attitudes towards community pharmacy and their preferences for the introduction of new services. Methods A self‐completion questionnaire was developed and 1,144 consumers in 55 community pharmacies were invited to complete it. The questionnaire covered consumers' choice of pharmacy; their perceptions of, and actual interactions with, community pharmacists; advice from pharmacists about general health and prescribed medicines; and privacy in the pharmacy. Respondents were asked for their views about five possible new services. Setting The study was based in community pharmacies in Riyadh City, Saudi Arabia. Key findings The response rate was 79.6%. Fifty‐nine per cent of respondents often or sometimes visited a particular pharmacy. One‐quarter of respondents perceived community pharmacists as having a good balance between health and business matters, while 56.1% thought pharmacists were more concerned with the business. The majority of respondents (69.7%) said they felt comfortable asking the pharmacist for advice. Just under half (44.8%) felt that pharmacists allowed them enough time to discuss their problem fully and listened well. In addition, 58.5% of respondents indicated that their pharmacists showed sensitivity to privacy by speaking more quietly across the counter. In 14.4% of situations pharmacists were reported to use a private area within the pharmacy when discussing personal or private matters. Most respondents (65.2%) indicated that their pharmacist was willing to discuss their health problems and tried to understand their feelings. Consumers' priorities for new services were: monitoring blood pressure; measuring weight, height and temperature; monitoring blood sugar; and monitoring cholesterol. Conclusion This study showed that most pharmacy customers feel comfortable seeking advice from their pharmacist. Although many pharmacists were reported to show sensitivity to a possible lack of privacy in the pharmacy, few respondents reported that their pharmacy had a private area for discussion. Customers' views on possible new services were generally positive, with the exception of patient medication records.  相似文献   
44.
This is a prospective study evaluating 28 patients who were suspected to have ectopic pregnancy. Frozen section Pipelle endometrial biopsy was performed as an outpatient procedure to look for the presence of chorionic villi in the specimen. The sensitivity of the frozen section endometrial biopsy in detecting the presence of chorionic villi was 13.3% and the specificity was 100%. The positive predictive value was 100% and the negative predictive value was 50%. We concluded that frozen section endometrial biopsy was not helpful in predicting intrauterine gestational process; therefore, it has a limited application in patients suspected to have ectopic pregnancy.  相似文献   
45.
Sixty-seven residents of a rural Midwestern state were surveyed by telephone to determine which factors influence their willingness to receive mental health services through live, two-way audio and video transmission. Two-thirds of the survey respondents were willing to participate in telepsychiatry. Many expressed reluctance, however. They were concerned about maintaining confidentiality, and they perceived telepsychiatry as impersonal. Medicare enrollees and older survey respondents were less willing than younger respondents to endorse the use of telemedicine.  相似文献   
46.
PURPOSE: This multicenter, open-label, phase I/IIa study was undertaken to establish the safety/toxicity profile of cetuximab in combination with gemcitabine and carboplatin in patients with chemotherapy-na?ve, epidermal growth factor receptor-positive, stage IV non-small-cell lung cancer. Secondary objectives were to gather preliminary evidence of efficacy including tumor response rate, time to progression, and overall survival. PATIENTS AND METHODS: Thirty-five patients received a total of 264 3-week cycles of treatment with cetuximab, carboplatin, and gemcitabine. An initial dose of cetuximab 400 mg/m2 intravenously was administered the first week, followed by weekly doses of 250 mg/m2. Carboplatin (area under the curve = 5, day 1) and gemcitabine 1,000 mg/m2 on days 1 and 8 were administered every 3 weeks. Patients were evaluated for tumor response after every two cycles of therapy. RESULTS: The most frequently reported adverse events related to cetuximab included an acne-like rash (88.6%), dry skin (34.3%), asthenia and skin disorders (31.4%), mucositis/stomatitis (25.7%), fever/chills (20%), and nausea/vomiting (17.1%). The majority of these toxicities were mild to moderate. One patient withdrew from the study because of a grade 3 allergic reaction. Myelosuppression was the most frequently observed toxicity related to chemotherapy. Responses among 35 assessable patients included 10 partial responses (28.6%). Twenty-one patients had stable disease. The median time to progression was 165 days, and the median overall survival was 310 days. CONCLUSION: The combination of cetuximab, carboplatin, and gemcitabine was well tolerated with an acceptable toxicity profile. Most grade 3 adverse events were attributable to chemotherapy. The response rate and median survival are encouraging and warrant additional investigation.  相似文献   
47.
Objective: To assess the pharmaceutical sector to know whether people have access to essential medicines. Setting: The study was conducted in 20 public health clinics, five public district drug stores and 20 private retail pharmacies selected randomly in five different areas randomly selected (four states and a federal territory). Method: The methodology used was adopted from the World Health Organization study protocol. The degree of attainment of the strategic pharmaceutical objectives of improved access is measured by a list of tested indicators. Access is measured in terms of the availability and affordability of essential medicines, especially to the poor and in the public sector. The first survey in the public health clinics and public district drug stores gathered information about current availability of essential medicines, prevalence of stock-outs and affordability of treatment (except drug stores). The second survey assessed affordability of treatment in public health clinics and private retail pharmacies. Main Outcome Measure Availability, stock-out duration, percent of medicines dispensed, accessibility and affordability of key medicines. Results The average availability of key medicines in the public health clinics for the country was 95.4%. The average stock-out duration of key medicines was 6.5 days. However, average availability of key medicines in the public district drug stores was 89.2%; with an average stock-out duration of 32.4 days. Medicines prescribed were 100% dispensed to the patients. Average affordability for public health clinics was 1.5 weeks salary and for the private pharmacies, 3.7 weeks salary. Conclusions: The present pharmaceutical situation in the context of essential medicines list implementation reflected that the majority of the population in Malaysia had access to affordable essential medicines. If medicines need to be obtained from the private sector, they are hardly affordable. Although the average availability of essential medicines in Malaysia was high being more than 95.0%, in certain areas in Sabah availability was less than 80.0% and still a problem.  相似文献   
48.
AIM: To evaluate the effect of prophylactic administration of nepafenac in prevention of macular edema occurring in diabetic patients after phacoemulsification and to investigate the correlation between optical coherence tomography (OCT) foveal thickness and multifocal electroretinogram (MF-ERG) parameters. METHODS: The study included two groups. Group 1 included 50 diabetic patients with senile cataract (50 eyes, 30 females, 20 males, aged 55±7y) received nepafenac 0.1% eye drop. Group 2 included another 50 diabetic patients with senile cataract (50 eyes, 22 female, 28 males, aged 53.8±8y) did not receive nepafenac. All patients were followed up for 3mo postoperatively. OCT and MF-ERG were done preoperative and at 1wk, 1, 2 and 3mo. RESULTS: The mean foveal thickness was statistically significantly lower in Group 1. Five eyes in Group 2 developed clinical cystoid macular oedema (CMO) (10%), and no patients in Group 1 developed central macular thickening more than 50 μm. There were insignificant differences in MF-ERG amplitudes and latencies between the two groups except in the five eyes that developed CMO, there statistically significant reduction of MF-ERG amplitude with increase in foveal thickness. CONCLUSION: Perioperative nepafenac reduces the incidence of CMO following uncomplicated phacoemulsification significantly. Nepafenac has no side effects.  相似文献   
49.
BackgroundInborn errors of metabolism (IEMs) commonly present with pediatric cardiomyopathy. Identification of the underlying cause is necessary as it may lead to improved outcomes.ObjectivesWe aimed to investigate the diagnostic rate, the clinical, and biochemical spectra of IEMs among Egyptian pediatric patients presenting with cardiomyopathy, and their outcome measures.MethodsWe retrospectively analyzed the clinical, biochemical, and radiological data of 1512 children diagnosed with cardiomyopathy at Cairo University Children''s Hospital over a 5-year duration.ResultsTwo hundred twenty-nine children were clinically suspected as IEMs and underwent metabolic workup. Nineteen different IEMs were confirmed in 57 (24.4%) of the suspected children. Their median age at presentation was 2.6 years and the majority had extra-cardiac manifestations. Hypertrophic cardiomyopathy represented 43/57 (75.4%) of confirmed cases, while dilated cardiomyopathy represented 13/57 (22.8%), and one patient presented with a mixed phenotype. Twenty- six patients (45.6%) survived, while 31 patients (54%) either died or were lost to follow up and assumed deceased.ConclusionsWe developed for the first time a database and a diagnostic scheme for metabolic cardiomyopathies in Egyptian children. With the recent introduction of enzyme replacement therapy, many metabolic disorders became treatable, thus establishing an early and accurate diagnosis is extremely important.  相似文献   
50.
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