全文获取类型
收费全文 | 79501篇 |
免费 | 6012篇 |
国内免费 | 625篇 |
专业分类
耳鼻咽喉 | 1276篇 |
儿科学 | 1521篇 |
妇产科学 | 1331篇 |
基础医学 | 12640篇 |
口腔科学 | 1451篇 |
临床医学 | 7265篇 |
内科学 | 15714篇 |
皮肤病学 | 2657篇 |
神经病学 | 6777篇 |
特种医学 | 4125篇 |
外科学 | 10260篇 |
综合类 | 628篇 |
现状与发展 | 1篇 |
一般理论 | 21篇 |
预防医学 | 4477篇 |
眼科学 | 2037篇 |
药学 | 7027篇 |
中国医学 | 781篇 |
肿瘤学 | 6149篇 |
出版年
2023年 | 392篇 |
2022年 | 1099篇 |
2021年 | 2360篇 |
2020年 | 1268篇 |
2019年 | 1860篇 |
2018年 | 2144篇 |
2017年 | 1668篇 |
2016年 | 2403篇 |
2015年 | 3162篇 |
2014年 | 3691篇 |
2013年 | 4328篇 |
2012年 | 6357篇 |
2011年 | 6104篇 |
2010年 | 3628篇 |
2009年 | 3056篇 |
2008年 | 4442篇 |
2007年 | 4349篇 |
2006年 | 3924篇 |
2005年 | 3669篇 |
2004年 | 3177篇 |
2003年 | 2771篇 |
2002年 | 2533篇 |
2001年 | 1672篇 |
2000年 | 1604篇 |
1999年 | 1327篇 |
1998年 | 576篇 |
1997年 | 504篇 |
1996年 | 426篇 |
1995年 | 423篇 |
1994年 | 331篇 |
1993年 | 338篇 |
1992年 | 772篇 |
1991年 | 780篇 |
1990年 | 685篇 |
1989年 | 719篇 |
1988年 | 714篇 |
1987年 | 681篇 |
1986年 | 590篇 |
1985年 | 589篇 |
1984年 | 452篇 |
1983年 | 397篇 |
1982年 | 279篇 |
1981年 | 262篇 |
1980年 | 239篇 |
1979年 | 368篇 |
1978年 | 317篇 |
1977年 | 220篇 |
1974年 | 239篇 |
1973年 | 252篇 |
1972年 | 205篇 |
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
81.
82.
83.
Jae-Seung Paick Soo Woong Kim Seung-June Oh Ja Hyeon Ku 《International journal of urology》2007,14(8):699-703
AIM: We evaluated differences between men and women with lower urinary tract symptoms (LUTS) combined with nocturia. METHODS: A total of 71 age-matched female-male pairs (median 58, range 20-81 years) who had moderate to severe LUTS and nocturia of more than once per night were enrolled in this study. RESULTS: In the younger group (<50 years), the International Prostate Symptom Score (I-PSS) results of the sexes were not significantly different. However, although total I-PSS results in the elderly group (> or =50 years) were not significantly different, quality of life index scores for women were higher (P = 0.002). On frequency-volume (FV) charts, mean total daytime voided volume (DVV) was significantly higher in younger men than in younger women (P = 0.017), but the mean nocturnal polyuria index (NPi) for women was higher than that for men (P = 0.047). However, maximum DVV (P = 0.009), mean DVV (P < 0.0001), total DVV (P < 0.0001), and mean nocturnal urine volume (P = 0.009) were significantly higher in elderly men than in elderly women. However, numbers of daytime voids were not different. CONCLUSION: Elderly women with LUTS have lower functional bladder capacities than elderly men, as suggested by their smaller mean voided volumes. However, no significant differences were observed between numbers of daytime voids, which was probably due to the smaller total daytime voided volumes of elderly women. In addition, although NPi for younger women and nocturnal urine volume for elderly men was higher, no other differences were observed in terms of other night-time parameters. 相似文献
84.
S. A. R. Nouraei C. B. Singh M. S. Ferguson K. Young D. Roy J. M. Philpott 《European journal of plastic surgery》2007,30(4):153-157
The objective of this study is to assess the results of repairing septal perforations with a vascularized pedicled alar cartilage
island flap. Using the external rhinoplasty approach, a vascularized flap of alar cartilage, harvested as a cephalic trim
and pedicled on the ascending columellar branches of the superior labial artery was raised. Bilateral mucoperichondrial septal
flaps were elevated and the alar flap was transposed and secured within the defect and bilaterally overlaid with temporalis
fascia. Silastic sheets were placed and remained in situ until the grafts were revascularized from the peripheries of the
defect as well as centrally from the alar flap. The revascularized temporalis fascia acted as a scaffold for nasal remucosalization.
The alar flap also increased the long-term structural robustness of the repair. Between 1999 and 2003, 14 patients with septal
perforations ranging from 10 to 31 mm underwent septal reconstruction using this technique. There were nine males and five
females. The flap was successfully raised in all cases and long-term closure was maintained in 12 patients (86%). The alar
cartilage flap is an effective technique for repairing septal perforations in selected patients. It provides vascularized
tissue which nourishes the grafts during remucosalization, and a cartilaginous framework, which affords long-term structural
support to the repair. It also obviates the need to transpose nasal mucosa and create a secondary defect. The rhinoplasty
approach furthermore permits additional nasal deformities to be corrected at the same time.
Presented at the British Association of Plastic Surgeons Summer Scientific Meeting, Sheffield, UK (12 July 2006). 相似文献
85.
Dongsoon Shin 《Nutrition Research And Practice》2009,3(1):31-37
Recently, Korean people are consuming seaweeds almost 3.5 times more now than three decades ago. It is well known that seaweeds contain lots of soluble dietary fiber in addition to micronutrients such as β-carotene, iodine and some bioactive components. Seaweeds are considered to be effective for preventing chronic diseases including obesity, diabetes mellitus, atherosclerosis, cancer or constipation. This study was conducted to investigate the effect of seamustard intake on body weight gain, blood glucose level and lipid profiles in rats fed diets with different energy nutrient composition. Male Sprague-Dawley rats (average initial weight 103.7 g) were divided into groups for two experiments as follows; Control, M2.5 & M5 groups (Exp. I) and M5, M10, HCM5, HCM10, HFM5 & HFM10 groups (Exp. II). The rats were fed diet and water ad libitum for 4 weeks. In general, there was no significant difference in blood glucose and triglyceride concentration among groups. In Exp. I, serum LDL-cholesterol level of rats fed diet with 5% seamustard powder (M5) was significantly lower than that of control group, while HDL-cholesterol level, TC/LDL ratio and weight of adrenal gland were higher. In Exp. II, food intake, body weight gain and EER of high fat diet with 10% seamustard group (HFM10) were the lowest among groups. Except gastrocnemius muscle, all organ weights of HFM10 group were the lowest. Fecal cholesterol excretion and serum LDL-cholesterol concentration of HFM10 group were the highest, while serum HDL-cholesterol level was the lowest among groups. Interestingly, HDL-cholesterol concentration was the highest in HCM5 group among groups. From these results, it was suggested that seamustard intake might be more effective for body weight control, but not for improving blood lipid profiles in high fat diet than in high carbohydrate diet. 相似文献
86.
Mikihiko Kudo Takahiko Misumi Kiyoshi Koizumi Hankei Shin 《Annals of thoracic and cardiovascular surgery》2005,11(2):121-124
A 78-year-old woman with diagnosis of acute myocardial infarction (AMI) in the anteroseptal area fell into cardiogenic shock suddenly just before starting percutaneous coronary intervention (PCI). Echocardiography showed left ventricular free wall rupture, then an emergent operation was performed by sutureless patch repair using collagen fleece with fibrinogen-based impregnation. Eight days later from the initial operation, the onset of ventricular septal perforation (VSP) was recognized. Fifteen days after, the infarct exclusion technique with endocardial patch was performed. She has been doing well 4 months after the operation without residual shunt. To our best knowledge, this is the first surgical case report that free wall rupture of left ventricle and VSP which are serious complications after myocardial infarction happened in succession. 相似文献
87.
88.
This study has shown that the retinae of Prototherian (egg-laying) mammals possess two neuronal types that are present in non-mammalian retinae, but absent or morphologically different in the retinae of Eutherian (placental) mammals. First, endogenous serotonin-like immunoreactivity has been localized in a population of presumptive amacrine cells in the platypus retina, the first such report in a mammalian retina. Second, the protein kinase C-immunoreactive (PKC-IR) bipolar cells in the echidna retina appear similar to the PKC-IR bipolars in the chicken retina, in that their dendrites give rise to a Landolt's club and their axons are multistratified. By contrast, the PKC-IR rod bipolar cells in the rabbit and in the brushtail possum, a Metatherian (marsupial) mammal, have no Landolt's clubs and their axons form terminal lobes in the innermost stratum of the inner plexiform layer. 相似文献
89.
90.